US4565521A - Safety pilot burners - Google Patents
Safety pilot burners Download PDFInfo
- Publication number
- US4565521A US4565521A US06/498,373 US49837383A US4565521A US 4565521 A US4565521 A US 4565521A US 49837383 A US49837383 A US 49837383A US 4565521 A US4565521 A US 4565521A
- Authority
- US
- United States
- Prior art keywords
- duct
- gas
- tube
- air
- burner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q9/00—Pilot flame igniters
Definitions
- the invention relates to apparatus for controlling the induction of ambient gas into a fluid stream and particularly but not exclusively for controlling the ingress of primary air into a stream of fuel gas in a pilot burner in accordance with variations in ambient temperature.
- the known mechanism can be arranged to effect the cutting off of the gas supply not only if the pilot burner is extinguished by, for example, a temporary disruption in gas supply thereto but also when the flame is extinguished because of a reduction in the oxygen content of the atmosphere in which the pilot burner is operating.
- the pilot burner In order that the pilot burner shall be sufficiently sensitive to the oxygen content of the atmosphere to provide gas cut off at a predetermined depleted oxygen content, and at the same time to ignite and burn satisfactorily in a normal atmosphere at a wide range of operating temperatures, it has been found necessary to control the amount of atmospheric air mixed with the fuel gas in the burner according to the ambient temperature. Hitherto, the control of the mixture of air with the gas has been effected by controlling the size of the air port through which air is induced into the burner tube, but apparatus for achieving this objective has suffered from the disadvantages of being complicated to manufacture and susceptible to interference by accumulation of lint around the air intake port, and it is an object of the invention to obviate the above mentioned disadvantages.
- apparatus for inducing ambient gas into a fluid stream comprising a duct for said stream, which duct has at least one port through which ambient gas may enter the duct and a constriction upstream of the at least one port with reference to the direction of flow of the stream, means for varying the resistance to the flow of fluid along the duct downstream of said at least one port.
- the resistance varying means may comprise a choke, adjustable within the duct for controlling the effective internal cross section thereof.
- the choke may take the form of a pin arranged for projection into the interior of the duct through an opening therein. The adjustment of the choke may be effected by a bi-metallic strip.
- FIG. 1 is a side elevation of pilot burner
- FIG. 2 is a plan view of the burner of FIG. 1;
- FIG. 3 is a section on lines III-III of FIG. 2.
- the pilot burner comprises a burner tube 1 which is threaded at one end 2 for connection to a gas supply and provided at the other end with a ceramic ring 3 defining a flame port.
- the tube 1 is pierced by four air ports 5 through which, in use, air is admitted into the tube under the influence of the flow of gas passing upwardly from the orifice 4 into the wider upper portion of the tube.
- the tube is provided with an opening through which a choke pin 7, attached at one end to a flexible bi-metallic strip 8 can be introduced into the interior of the tube.
- the introduction of the pin 7 into the interior of the tube increases the resistance of the tube to the flow of gas therealong, the increased resistance varying according to the extent of penetration of the pin.
- the bi-metallic strip is of a type known in the art and is bent to provide a horizontal portion 9 which is provided with a hole enabling it to be slid along the tube from its upper end in assembly of the burner, and by which it is secured to the hexagonal flange 10 which also serves in threading the burner onto the gas supply.
- the size of the choke pin 7 and the behaviour of the bi-metallic strip 8 are so arranged that in cold operating conditions the pin 7 penetrates fully into the tube 1 and increases the resistance to flow so greatly that a minimum of air is induced through the air ports 5 and the mixture passing out of the flame port is so rich in gas as to be readily ignitable even at the low temperature.
- the reduced volumetric flow rate also aids ignition.
- the bi-metallic strip bends to the right as shown in FIG.
- the pin 7 will be withdrawn to the outside of the tube 1, and for this reason the pin is tapered towards its free end so that it may readily re-locate in the opening 6 when, on cooler conditions obtaining, the metallic strip 8 moves to the left in the figure.
- the pin 7 is provided with an annular groove by which it is loosely retained in keyhole slot 11 formed in the strip 8.
- the control of the induced air is not in this burner effected by varying the size of the air inlet ports 5, these may be made considerably larger than in other burners with the advantage that the rate of air flow therethrough is reduced and the possibility of the air stream carrying particulate material along with it is diminished.
- the burner may be provided with a cylindrical mesh sleeve 13 to act as a filter for the incoming air.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
Description
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/498,373 US4565521A (en) | 1983-05-26 | 1983-05-26 | Safety pilot burners |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/498,373 US4565521A (en) | 1983-05-26 | 1983-05-26 | Safety pilot burners |
Publications (1)
Publication Number | Publication Date |
---|---|
US4565521A true US4565521A (en) | 1986-01-21 |
Family
ID=23980816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/498,373 Expired - Fee Related US4565521A (en) | 1983-05-26 | 1983-05-26 | Safety pilot burners |
Country Status (1)
Country | Link |
---|---|
US (1) | US4565521A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5104311A (en) * | 1991-01-08 | 1992-04-14 | General Electric Company | Autoregulation of primary aeration for atmospheric burners |
US5139413A (en) * | 1989-05-11 | 1992-08-18 | Samsung Electronics Co., Ltd. | Pilot burner safety device with methods of ambient air flow regulation into a flame nozzle |
US5163830A (en) * | 1991-08-29 | 1992-11-17 | Greene Manufacturing Company | Fuel-air mixer tube |
US5215456A (en) * | 1991-06-29 | 1993-06-01 | Nakajima Copper Works, Inc. | Gas combustion method and apparatus |
US20040081933A1 (en) * | 2002-10-25 | 2004-04-29 | St. Charles Frank Kelley | Gas micro burner |
US20050069831A1 (en) * | 2002-10-25 | 2005-03-31 | Brown & Williamson U.S.A., Inc. | Gas micro burner |
US20070079770A1 (en) * | 2004-12-03 | 2007-04-12 | American Water Heater Company, A Corporation Of Nevada | Water heater with lint collection detection |
US20100015560A1 (en) * | 2008-07-16 | 2010-01-21 | Kasprzyk Donald J | Pilot burner |
US20110045423A1 (en) * | 2009-08-24 | 2011-02-24 | Honeywell International Inc. | Gas pilot burner assembly |
US20110111353A1 (en) * | 2009-11-12 | 2011-05-12 | Intek Manufacturing Llc | Burner and ignition assembly and method |
US9303869B2 (en) | 2012-06-15 | 2016-04-05 | Honeywell International Inc. | Gas pilot burner assembly |
US9915431B2 (en) | 2013-03-14 | 2018-03-13 | Honeywell International Inc. | Gas pilot burner assembly |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE230775C (en) * | ||||
US717278A (en) * | 1902-08-05 | 1902-12-30 | Paul Riess | Gas-saving attachment. |
US726249A (en) * | 1903-02-12 | 1903-04-28 | Regina Music Box Company | Gas-check. |
US1513622A (en) * | 1923-04-09 | 1924-10-28 | Manning Refining Equipment Cor | Apparatus for revivifying purifying materials |
US1874970A (en) * | 1931-04-03 | 1932-08-30 | Columbia Burner Company | Gas burner spud |
US1914905A (en) * | 1930-02-19 | 1933-06-20 | Surface Combustion Corp | Valve structure for inspirators |
US2355216A (en) * | 1942-02-19 | 1944-08-08 | Milwaukee Gas Specialty Co | Pilot burner |
US2652108A (en) * | 1948-01-19 | 1953-09-15 | Honeywell Regulator Co | Gas fueled pilot burner having a bimetallic primary air valve |
US3635646A (en) * | 1970-08-27 | 1972-01-18 | Cox Mfg Co Inc | Gas burner |
-
1983
- 1983-05-26 US US06/498,373 patent/US4565521A/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE230775C (en) * | ||||
US717278A (en) * | 1902-08-05 | 1902-12-30 | Paul Riess | Gas-saving attachment. |
US726249A (en) * | 1903-02-12 | 1903-04-28 | Regina Music Box Company | Gas-check. |
US1513622A (en) * | 1923-04-09 | 1924-10-28 | Manning Refining Equipment Cor | Apparatus for revivifying purifying materials |
US1914905A (en) * | 1930-02-19 | 1933-06-20 | Surface Combustion Corp | Valve structure for inspirators |
US1874970A (en) * | 1931-04-03 | 1932-08-30 | Columbia Burner Company | Gas burner spud |
US2355216A (en) * | 1942-02-19 | 1944-08-08 | Milwaukee Gas Specialty Co | Pilot burner |
US2652108A (en) * | 1948-01-19 | 1953-09-15 | Honeywell Regulator Co | Gas fueled pilot burner having a bimetallic primary air valve |
US3635646A (en) * | 1970-08-27 | 1972-01-18 | Cox Mfg Co Inc | Gas burner |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5139413A (en) * | 1989-05-11 | 1992-08-18 | Samsung Electronics Co., Ltd. | Pilot burner safety device with methods of ambient air flow regulation into a flame nozzle |
US5104311A (en) * | 1991-01-08 | 1992-04-14 | General Electric Company | Autoregulation of primary aeration for atmospheric burners |
US5215456A (en) * | 1991-06-29 | 1993-06-01 | Nakajima Copper Works, Inc. | Gas combustion method and apparatus |
US5163830A (en) * | 1991-08-29 | 1992-11-17 | Greene Manufacturing Company | Fuel-air mixer tube |
US20040081933A1 (en) * | 2002-10-25 | 2004-04-29 | St. Charles Frank Kelley | Gas micro burner |
US6827573B2 (en) * | 2002-10-25 | 2004-12-07 | Brown & Williamson Tobacco Corporation | Gas micro burner |
US20050069831A1 (en) * | 2002-10-25 | 2005-03-31 | Brown & Williamson U.S.A., Inc. | Gas micro burner |
US7488171B2 (en) | 2002-10-25 | 2009-02-10 | R.J. Reynolds Tobacco Company | Gas micro burner |
US20080029047A1 (en) * | 2004-12-03 | 2008-02-07 | American Water Heater Company | Water heater with lint collection detection |
US20070079770A1 (en) * | 2004-12-03 | 2007-04-12 | American Water Heater Company, A Corporation Of Nevada | Water heater with lint collection detection |
US20100015560A1 (en) * | 2008-07-16 | 2010-01-21 | Kasprzyk Donald J | Pilot burner |
US8636503B2 (en) | 2008-07-16 | 2014-01-28 | Honeywell International Inc. | Pilot burner |
US20110045423A1 (en) * | 2009-08-24 | 2011-02-24 | Honeywell International Inc. | Gas pilot burner assembly |
US8512034B2 (en) | 2009-08-24 | 2013-08-20 | Honeywell International Inc. | Gas pilot burner assembly |
US20110111353A1 (en) * | 2009-11-12 | 2011-05-12 | Intek Manufacturing Llc | Burner and ignition assembly and method |
US8807987B2 (en) * | 2009-11-12 | 2014-08-19 | Unified Brands, Inc. | Burner and ignition assembly and method |
US9303869B2 (en) | 2012-06-15 | 2016-04-05 | Honeywell International Inc. | Gas pilot burner assembly |
US9915431B2 (en) | 2013-03-14 | 2018-03-13 | Honeywell International Inc. | Gas pilot burner assembly |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GEO.BRAY & CO.LIMITED EDUCATION RD.LEEDS LS7 2AN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HANCOCK, JOHN;REEL/FRAME:004134/0729 Effective date: 19830504 Owner name: GEO.BRAY & CO.LIMITED EDUCATION RD.LEEDS LS7 2AN, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HANCOCK, JOHN;REEL/FRAME:004134/0729 Effective date: 19830504 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19900121 |